Sly the Sleuth and the Sports Mysteries — Donna Jo Napoli

Sly (a.k.a. Sylvia) has newly set up shop as a neighborhood detective, and the advice from Kirkus Reviews is plain and simple: "Clear some shelf space" for this funny, engaging series.With each zany mystery brought to her by friends and parents -- this time involving soccer, ballet, swimming, and basketball -- Sly uses her keen observation and reasoning skills to solve the case, while young readers will get a kick out of guessing the solutions alongside her.